The Pro Action Replay was Datels answer to Codemasters Game Genie. While the Action Replay certainly wasn't nearly as popular as the Game Genie brand back in the NES days, due to poor distribution and code availability, the Action Replay took the power out of the Game Genie when the Super Nintendo.

The Game Genie brand was then put to rest by Galoob as they couldn't compete with Datel, but Datel and the Action Replay brand still exists and is just as powerful as the SNES days, though I doubt that many people use cheat devices today. One of the great things about the Action Replay was/is that it not only allowed for people to cheat in games, but it also worked as a game converter for playing import games.

Below is a list of Action Replay codes for the NES that I've collected from various magazines over the years. As said, the availability of Action Replay codes was scarce as the idea was that people were supposed to find the codes on their own.